A study was conducted at Neighborhood Health Centers to evaluate procedures to improve compliance with referrals of patient at risk for cancer. Intervention consisted of a standardized communication from the exit nurse, a patient form to be returned after compliance, and one written and one telephone reminder as needed. Compliance was 68.2 percent in a control group and 89.0 percent among patients who received the experimental intervention, a significant increase of 20.8 percent (95% CI: 12.5, 29.1).